Refactor: create common.h and move logging function there

src/common.h

@@ -0,0 +1,17 @@
+/*! @file common.h
+    @brief Header for shared utilities and constants
+ */
+#ifndef COMMON_H_
+#define COMMON_H_
+
+#include <string>
+#include <iostream>
+
+/*! Logs a message
+    @param message The string to be logged
+ */
+static void log(std::string message) {
+  std::cout << "wtpp: " << message << '\n';
+}
+
+#endif // COMMON_H_

src/wtpp.cpp

@@ -1,12 +1,14 @@
 #include <array>
 #include <cmath>
 #include <cstdint>
-#include <iostream>
 #include <string>
 #include <type_traits>
 
 #include <math.h>
 
+#include "ini.h"
+
+#include "common.h"
 #include "wave.h"
 #include "generators.h"
 #include "wavetable.h"
@@ -14,14 +16,6 @@
 static const uint32_t DEFAULT_SAMPLE_RATE = 44100; // 44.1 kHz sampling rate
 static const uint8_t DEFAULT_BIT_DEPTH = 12;
 
-/*! Logs a message
-    @param message The string to be logged
- */
-static void log(std::string message)
-{
-  std::cout << "wtpp: " << message << '\n';
-}
-
 int main()
 {
   log("Generating wave cycle lookup tables");